arch/powerpc/include/uapi/asm/bootx.h

Source file repositories/reference/linux-study-clean/arch/powerpc/include/uapi/asm/bootx.h

File Facts

System
Linux kernel
Corpus path
arch/powerpc/include/uapi/asm/bootx.h
Extension
.h
Size
4416 bytes
Lines
134
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _UAPI__ASM_BOOTX_H__
#define _UAPI__ASM_BOOTX_H__

#include <linux/types.h>

#ifdef macintosh
#include <Types.h>
#include "linux_type_defs.h"
#endif

#ifdef macintosh
/* All this requires PowerPC alignment */
#pragma options align=power
#endif

/* On kernel entry:
 *
 * r3 = 0x426f6f58    ('BooX')
 * r4 = pointer to boot_infos
 * r5 = NULL
 *
 * Data and instruction translation disabled, interrupts
 * disabled, kernel loaded at physical 0x00000000 on PCI
 * machines (will be different on NuBus).
 */

#define BOOT_INFO_VERSION               5
#define BOOT_INFO_COMPATIBLE_VERSION    1

/* Bit in the architecture flag mask. More to be defined in
   future versions. Note that either BOOT_ARCH_PCI or
   BOOT_ARCH_NUBUS is set. The other BOOT_ARCH_NUBUS_xxx are
   set additionally when BOOT_ARCH_NUBUS is set.
 */
#define BOOT_ARCH_PCI                   0x00000001UL
#define BOOT_ARCH_NUBUS                 0x00000002UL
#define BOOT_ARCH_NUBUS_PDM             0x00000010UL
#define BOOT_ARCH_NUBUS_PERFORMA        0x00000020UL
#define BOOT_ARCH_NUBUS_POWERBOOK       0x00000040UL

/*  Maximum number of ranges in phys memory map */
#define MAX_MEM_MAP_SIZE				26

/* This is the format of an element in the physical memory map. Note that
   the map is optional and current BootX will only build it for pre-PCI
   machines */
typedef struct boot_info_map_entry
{
    __u32       physAddr;                /* Physical starting address */
    __u32       size;                    /* Size in bytes */
} boot_info_map_entry_t;


/* Here are the boot informations that are passed to the bootstrap
 * Note that the kernel arguments and the device tree are appended
 * at the end of this structure. */
typedef struct boot_infos
{
    /* Version of this structure */
    __u32       version;
    /* backward compatible down to version: */
    __u32       compatible_version;

    /* NEW (vers. 2) this holds the current _logical_ base addr of
       the frame buffer (for use by early boot message) */
    __u8*       logicalDisplayBase;

    /* NEW (vers. 4) Apple's machine identification */
    __u32       machineID;

    /* NEW (vers. 4) Detected hw architecture */
    __u32       architecture;

    /* The device tree (internal addresses relative to the beginning of the tree,
     * device tree offset relative to the beginning of this structure).
     * On pre-PCI macintosh (BOOT_ARCH_PCI bit set to 0 in architecture), this
     * field is 0.
     */
    __u32       deviceTreeOffset;        /* Device tree offset */
    __u32       deviceTreeSize;          /* Size of the device tree */

    /* Some infos about the current MacOS display */
    __u32       dispDeviceRect[4];       /* left,top,right,bottom */
    __u32       dispDeviceDepth;         /* (8, 16 or 32) */
    __u8*       dispDeviceBase;          /* base address (physical) */
    __u32       dispDeviceRowBytes;      /* rowbytes (in bytes) */
    __u32       dispDeviceColorsOffset;  /* Colormap (8 bits only) or 0 (*) */
    /* Optional offset in the registry to the current
     * MacOS display. (Can be 0 when not detected) */
     __u32      dispDeviceRegEntryOffset;

Annotation

Implementation Notes